Dupilumab Treatment of Atopic Dermatitis in Routine Clinical Care: Baseline Characteristics of Patients in the PROLEAD Prospective, Observational Study

Introduction Dupilumab is the first biologic licensed to treat patients with moderate-to-severe atopic dermatitis (AD) who require systemic therapy. PROLEAD was designed to document the real-world effectiveness and safety of dupilumab in patients with moderate-to-severe AD. The present study aims to describe the baseline characteristics of patients treated with dupilumab in Germany. Methods PROLEAD is a national, multicentre, prospective, non-interventional study, with a 2-year observation period. Adults with moderate-to-severe AD treated with dupilumab were included. Baseline characteristics, physician assessments, and patient-reported outcomes (PROs) were collected. Results The study involved 126 sites throughout Germany. Of 839 patients assessed for eligibility, 828 were included, with baseline data available for 817 patients. Mean (standard deviation, SD) age of patients was 43.4 (15.8) years, with 396 (48.5%) patients being female. Overall, 66.6% of patients received their first diagnosis of AD during childhood. In total, 423 (51.8%) patients had co-existing atopic and type 2 inflammatory diseases, including allergic conjunctivitis (36.8%) and bronchial asthma (22.5%). Overall, 61.4% of patients had received systemic therapy, most commonly oral corticosteroids (49.9%). Approximately half of patients (51.3%) had received UV/phototherapy prior to baseline. Treatment with moderate-potent (Class 2) or potent (Class 3) topical corticosteroids was the most common concomitant treatment at baseline. However, 50.4% of patients had not received concomitant AD treatment with dupilumab at baseline. The most reported reason for initiating dupilumab was “Topical therapy alone was not sufficient” (95.1%). Mean (SD) physician assessments: EASI: 22.9 (14.5); SCORAD: 63.3 (16.2); IGA: 3.3 (0.7). Mean (SD) PROs: DLQI: 13.9 (7.1); peak pruritus NRS: 7.4 (2.3). Conclusions Patients with moderate-to-severe AD present a long medical history, impaired quality of life, and high prevalence of co-existing type 2 inflammatory diseases. Dupilumab was used as a first-line systemic treatment in 38.6% of patients.